Background technology
Can write down in the middle of the standardization fast development of the read-only and CD-RW of the novel high-density of a large amount of high-quality videos and voice data, and be expected in the near future that the disks Related product will occur on market.Can rewrite Blu-ray disc (BD-RW) is an example of this disks.
Fig. 1 shows the file structure of BD-RW.File structure or data structure are provided for the video of management accounts on BD-RW and the reproduction of voice data.As shown in the figure, this data structure comprises the root directory that contains a BDAV catalogue at least.This BDAV catalogue comprises: such as the file of " info.bdav ", " menu.tidx " and " mark.tidx ", store play list file (
*.rpls and
*.vpls) PLAYLIST (playlist) sub-directory, store fragment (clip) message file (
*.clpi) CLIPINF (frag info) sub-directory, and store A/V flow segment file corresponding to the MPEG2 form of clip information file (
*.m2ts) STREAM (stream) sub-directory.Except the optical disc data structure was shown, Fig. 1 also showed each zone of CD.For example, general information file info.bdav is stored in one or more general informations zone on the CD.
Because BD-RW data structure as shown in Figure 1 and dish form have been widely known by the people and are existing existing, so the brief overview to file structure only is provided in disclosure file.
Mention as top institute, this STREAM (stream) catalogue comprises the A/V stream file of the MPEG2 form that is called fragment.The stream catalogue also can comprise the fragment of specific type, is called bridge-clip A/V stream file.This bridge-clip is used for being implemented in the selected two or more seamless links that show between the interval of fragment, and generally has size of data very little with respect to fragment.This A/V stream comprises the source data packet of video and voice data.For example, the source data packet of video data comprises header and transmits data packets.Source data packet comprises source packet number, and it generally is a sequence allocation number, as the address of this source data packet of visit.This transmits data packets comprises identifier (PID).Transmits data packets sequence under this PID identification transmits data packets.Each transmits data packets in this sequence has identical PID.
CLIPINF (frag info) catalogue comprises the clip information file that is associated with each A/V stream file.Except other, type, sequence information, programme information and the clocking information of the A/V stream that clip information file is pointed out to be associated with it.Sequence information has been described basis time of arrival (ATC) and system time basis (STC) series.For example, except other, series information points out the numbering of sequence, about the start and end time information of each sequence, the address of first source data packet in each sequence and the PID of the transmits data packets in each sequence.Programme content is called program sequence for fixing source data packet sequence.Except other, programme information points out the numbering of program sequence, about the start address of each program sequence and the PID of the transmits data packets in the program sequence.
Clocking information is called as characteristic point information (CPI).A kind of form of this CPI is inlet point (EP) map.The EP map is showing that time tag (for example, on basis time of arrival (ATC) and/or system time basis (STC)) maps to source data packet address (being source packet number).
PLAYLIST (playlist) catalogue comprises one or more play list file.The notion that proposes playlist is to be more prone to be used for reset for the editor/combination that makes fragment.This play list file is the broadcast set at interval in the fragment.Each is play and is used as a playitems playitem at interval.Except other, this play list file identification forms each playitems playitem of playlist, and except other, each playitems playitem is the going into point (IN-point) and go out point (OUT-point) (for example according to ATC or STC demonstration time tag) of position on the time shaft of a pair of this fragment of sensing.In other words, this play list file identification playitems playitem, fragment of each playitem points or its part, and discern the clip information file that is associated with this fragment.Except other, this clip information file is used for playitems playitem is mapped to the fragment of source data packet.
This playlist directory can comprise real play list (
*.rpls) and virtual playlist (
*.vpls).Real play list can only be used fragment and not use bridge-clip.That is, real play list is considered to the references part, therefore, is considered to be equal to the fragment part that is cited conceptive on disk space.Virtual playlist can be used fragment and bridge-clip, therefore, the concept nature of real play list is considered not exist for virtual playlist.
The info.bdav file is a general information file, and it provides the general information of the reproduction that is used for the A/V stream of management accounts on CD.More particularly, except other, the info.bdav file comprises the table of playlist, and it discerns the file name of the playlist in the playlist directory of same BDAV catalogue.
The information that this menu.tidx, menu.tdt1 are relevant with the menu sketch map with the menu.tdt2 file storage.The information that this mark.tidx, mark.tdt1 are relevant with the mark sketch map with the mark.tdt2 file storage.Because these files are specifically not related to the present invention, so they are not done further discussion.
For such as the standardization of the DVD-ROM of blue light ROM (BD-ROM) still in the middle of carrying out.Also there is not now a kind of management accounts that is used in active data structure such as the reproduction of video on the DVD-ROM of BD-ROM and voice data.
Embodiment
In order to understand the present invention fully, its preferred embodiment is described with reference now to accompanying drawing.
High density compact disc such as blue light ROM (BD-ROM) according to the present invention can have the file or the data structure of the reproduction of the video that is used to manage as shown in Figure 2 and voice data.The a lot of aspects according to data structure of the present invention as shown in Figure 2 are identical with the BD-RW standard of being discussed with reference to figure 1.Therefore very detailed description is not carried out in these aspects.
As shown in Figure 2, this root directory comprises and contains a DVP catalogue at least.Except other, the DVP catalogue comprises: general information file info.dvp, menu file menu.tidx and menu.tdt1, store play list file (for example true (
*.rpls) and virtual (
*.vpls)) PLAYLIST (playlist) catalogue, store clip information file (
*.clpi) CLIPINF (frag info) catalogue and store A/V flow segment file corresponding to the MPEG2-form of clip information file (
*.m2ts) STREAM (stream) catalogue.
This stream catalogue comprises the A/V stream file of the MPEG2-form that is called fragment.This STREAM (stream) catalogue also can comprise the fragment that is called bridge-clip A/V stream file of specific type.This bridge-clip is used for being implemented in the selected two or more seamless links that show between the interval of fragment, and generally has size of data very little with respect to fragment.This A/V stream comprises the source data packet of video and voice data.For example, the source data packet of video data comprises header and transmits data packets.Source data packet comprises source packet number, and it generally is the numbering of distributing continuously, and as the address of visiting this source data packet.This transmits data packets comprises identifier (PID).The sequence of the transmits data packets under this PID identification transmits data packets.Each transmits data packets in this sequence has identical PID.
This CLIPINF (frag info) catalogue comprises the clip information file that is associated with each A/V stream file.Except other, type, sequence information, programme information and the clocking information of the A/V stream that this clip information file is pointed out to be associated with it.This sequence information has been described basis time of arrival (ATC) and system time basis (STC) series.For example, except other, this series information points out the numbering of sequence, about the start and end time information of each sequence, the address of first source data packet in each sequence and the PID of the transmits data packets in each sequence.Programme content is called as program sequence for fixing source data packet sequence.Except other, this programme information points out the numbering of program sequence, about the start address of each program sequence and the PID of the transmits data packets in the program sequence.
Clocking information is called as characteristic point information (CPI).A kind of form of this CPI is inlet point (EP) map.This EP map is showing that time tag (for example, on basis time of arrival (ATC) and/or system time basis (STC)) maps to source data packet address (being source packet number).
This PLAYLIST (playlist) catalogue comprises one or more play list file.The notion that proposes playlist is that the editor/combination for the fragment that is used in playback is more prone to.This play list file is the broadcast set at interval in the fragment.Each is play and is used as a playitems playitem at interval.Except other, play list file identification forms each playitems playitem of playlist, and except other, each playitems playitem be on the time shaft of a pair of this fragment of sensing the position go into a little and go out point (for example according to ATC or STC demonstration time tag).In other words, play list file identification playitems playitem, fragment of each playitem points or its part, and discern the clip information file that is associated with this fragment.Except other, this clip information file is used to playitems playitem is mapped to the fragment of source data packet.
Playlist directory can comprise real play list (
*.rpls) and virtual playlist (
*.vpls).Real play list can only be used fragment and can not use bridge-clip.That is, real play list is considered to the references part, therefore, is considered to be equal to the fragment part that is cited conceptive on disk space.And virtual playlist can be used fragment and bridge-clip, therefore, the concept nature of real play list is considered not exist for virtual playlist.
The info.dvp file is a general information file, and it provides the general information of the reproduction that is used for the A/V stream of management accounts on CD.More particularly, except other, the info.dvp file comprises the table of playlist, the file name of the playlist in its identification PLAYLIST (playlist) catalogue.
Except the data structure that recording medium according to an embodiment of the invention is shown, Fig. 2 also shows each zone of recording medium.For example, general information file is recorded in one or more general informations zone, playlist directory is recorded in one or more playlist directory area, each playlists records in the playlist directory is medium in one or more playlist area of recording medium.Fig. 3 shows the example of the recording medium with the data structure among storage Fig. 2 in the above.As shown in the figure, recording medium comprises file system information area, database area and A/V stream zone.Database area comprises general information file and playlist information area and clip information area.General information file and playlist information area have and are recorded in the general information file in its general message file zone and are recorded in PLAYLIST (playlist) catalogue and play list file in its playlist information area.And clip information area has CLIPINF (frag info) catalogue that is recorded in wherein and the clip information file that is associated.A/V stream zone has the A/V stream about each title that is recorded in wherein.
This video and voice data are typically organized as independently title; For example, organized different titles by video with the different films that voice data shows.In addition, title can organized independently section to organized the identical mode of the mode of each chapter usually with books.
Owing to such as the large storage capacity of the novel high-density recording medium of BD-ROM CD, can write down the title or the division header of different titles, various version, and therefore can from recording medium, reproduce to it.For example, can on recording medium, write down the video data that has shown different camera angle.As another example, can on recording medium, write down the title that is associated with different language or the version of its part.As another example, can be on recording medium the director's of record header version and arenas version.Perhaps, can be on recording medium record header or adult's version of division header, young version and teenager's version (being the control version of all ages and classes).Each version shows different reproduction paths, and the video data in these examples is called as a plurality of reproduction path video data.The above-mentioned example that should be appreciated that a plurality of reproduction path video data is not restrictive, and the present invention can be applied to a plurality of reproduction path video data of any type or a plurality of type combination.As following detailed description with reference to embodiments of the invention, data structure according to the present invention comprises the path management information and/or the navigation information of the reproduction that is used for a plurality of reproduction path video data of management accounts on recording medium.
Be recorded at least one clip file on the BD-ROM (
*.m2ts) can be corresponding to a title, and be recorded in the form that A/V stream in this clip file is registered as the transmits data packets (TP) of MPEG2 form, wherein, the TP of a plurality of reproduction path data streams comprises for the unique packet ID (PID) of each reproduction paths (for example different camera angle), is used to discern this reproduction paths.
Belong to this clip file clip information file (
*.clpi) comprise path management information, be used for optionally playing the data stream of each reproduction paths.This path management information is registered as path sequence, and it comprises path sequence numbering and the video/audio PID that is used for each reproduction paths.
This clip information file also comprises search information, is used for optionally playing the data stream of each reproduction paths.For example, this clip information file comprises at least one inlet point (EP) map, is used for optionally visiting the transmits data packets that has unique data bag ID for the specific reproduction path.
Fig. 4 A shows first specific embodiment of the clip information file, dish data and the EP map that use in the data structure according to Fig. 2.Mention as top institute, at least one clip file of file structure that belongs to BD-ROM is corresponding to a title, and will be included in the TP that A/V stream in this clip file is recorded as a series of MPEG2 forms.
This TP has for the unique PID of each reproduction paths (for example camera angle), is used to discern this reproduction paths.Shown in Fig. 4 A, the first record segmentation (segmentation #1) of the title in the clip file comprises the TP (TP1) of the single path A/V stream with its same video PID that represents first reproduction paths (Video_PID=A) and audio frequency PID (Audio_PID=P).Title in the clip file second the record segmentation (segmentation #2) comprise have its expression three different reproduction paths (first to the 3rd reproduction paths) three different video PID (Video_PID=A, B or C) and the TP of audio frequency PID (Audio_PID=P, R or S).As shown in the figure, the TP in different reproduction path writes down in segmentation by multiplexed at this.
The 3rd record segmentation (segmentation #3) of the title in the clip file comprises the TP (TP1) of the single angle A/V stream with its first reproduction paths of expression and all have the TP (TP1) of same video PID (Video_PID=A) and audio frequency PID (Audio_PID=P).
Be used for these three path management information that write down the single reproduction paths of segmentation and the playback control that a plurality of reproduction paths A/V flows are registered as path sequence in the clip information file corresponding to this clip file.This path sequence comprises the number-of-fragments (being also referred to as sequence numbering) and the video/audio PID (Video_PID and Audio_PID) of the segmentation that this path sequence is corresponding with it, shown in Fig. 4 A.
More particularly, corresponding to first the record segmentation path sequence #1 comprise " Video_PID=A " and " Audio_PID=P " and information, it represents first reproduction paths.Path sequence #2 corresponding to the second record segmentation comprises the information of " Video_PID=A, B, C " and " Audio_PID=P, R, S ", and it represents first, second and the 3rd reproduction paths.Equally, comprise the information of " Video_PID=C " and " Audio_PID=S " corresponding to the path sequence #3 of the 3rd record segmentation, it represents the 3rd reproduction paths.
Each path sequence also comprises with the numbering of reproduction paths in the corresponding record segmentation and about the relevant information of source packet number (SPN) of first transmits data packets in each reproduction paths.For example, path sequence #2 comprises SPN (A), SPN (B) and SPN (C), wherein, SPN (A) is about the source packet number of first source data packet in first reproduction paths (being Video_PID=A), and SPN (B) is to be source packet number (being Video_PID=C) about first source data packet in the 3rd reproduction paths about the source packet number of first source data packet in second reproduction paths (being Video_PID=B) and SPN (C).
This clip information file is storing search information also, is used for optionally Visitor Logs at the TP of each reproduction paths of first to the 3rd segmentation.For example, clip information file comprises that its demonstration time tag (PTS) maps to inlet point (EP) map of source packet number (SPN).
Can set up the EP map for each reproduction paths in this clip file.In the example of Fig. 4 A, can set up three inlet point maps (EP ground Fig. 1,2,3) corresponding to first, second and the 3rd reproduction paths.
Fig. 4 B shows existing time arrangement (time alignment) between the EP in different reproduction path map.As discussed, the EP map is map to source data packet such as the demonstration time mark information of representing in playitems playitem.More particularly, show that time tag is mapped to the address or the identifier of source data packet.This address or identifier are source packet number (SPN).Fig. 4 B further show be used for each reproduction paths 1,2 and 3 by the source data packet of representing along the source packet number that shows the time tag axle.As shown in the figure, the source data packet among each EP ground Fig. 1,2 and 3 has identical demonstration time tag.For example, from the source data packet x1 of the first reproduction paths A, have identical demonstration time tag T1 from the source data packet y1 of the second reproduction paths B and from the source data packet z1 of the 3rd reproduction paths C.Like this, this EP ground Fig. 1,2 and 3 is carried out the time arrangement.Owing to have this time to arrange,, also can realize the seamless-reproduced of video data even when the reproduction period reproduction paths is changed.Fig. 4 B shows by the change in the represented reproduction paths of two concentric circless.As shown in the figure, if the user changes into the first reproduction paths A to reproduction paths from the second reproduction paths B in the reproduction period decision of source data packet y2, so, after the reproduction of finishing source data packet y2, source data packet x3 is the next source data packet of reproducing.Similarly, if the user changes into the 3rd reproduction paths C to reproduction paths (for example camera angle being changed to observation point) from the first reproduction paths A in the reproduction period decision of source data packet x4, so, after the reproduction of finishing source data packet x4, reproduce source data packet z5.Should be appreciated that the source packet number that provides in the top example is exemplary.
Fig. 5 shows the synoptic diagram according to the embodiment of video disc recording of the present invention and transcriber.As shown in the figure, AV scrambler 9 receives the Voice ﹠ Video data and it is encoded.Voice ﹠ Video and coded message and stream attribute information that these AV scrambler 9 outputs have been encoded.Multiplexer 8 comes multiplexed Voice ﹠ Video data of having encoded according to coded message and stream attribute information, to set up for example mpeg 2 transport stream.Source packing device (packetizer) 7 is packaged into the source data packet consistent with the audio/video format of CD to the transmits data packets from multiplexer 8.As shown in Figure 5, the operation of AV scrambler 9, multiplexer 8 and source packing device 7 is by controller 10 controls.Controller 10 receives the user's input about recording operation, and provides control information to AV scrambler 9, multiplexer 8 and source packing device 7.For example, the type of coding that controller 10 indication AV scramblers 9 will be carried out, the transport stream that indication multiplexer 8 will be set up, and indication source packing device 7 source packet format that will adopt.Controller 10 is further controlled driver 3, to write down the output from source packing device 7 on CD.
Controller 10 is also set up the management information of the reproduction that is used for the audio/video data of management accounts on CD.For example, according to the information that receives via user interface (for example, the instruction set of preserving on dish is provided via Intranet or internet by computer system etc.), 10 pairs of drivers 3 of controller are controlled, with the data structure of record diagram on CD 2 and 4A-4B.
At reproduction period, 10 pairs of drivers 3 of controller are controlled, to reproduce this data structure.According to the information and (for example that is included in wherein via user interface, record and transcriber or with telepilot that this device is associated on control knob) user's input of receiving, 10 pairs of drivers 3 of controller are controlled, with from optical disc replay audio/video source data packet.For example, user's input can be specified the path that will reproduce.This user input can be for example via being pre-programmed in specifying in the controller 10 based on the graphic user interface of menu.Use this user input and from the path management information of optical disc replay, the reproduction of 10 pairs of specified paths of controller is controlled.
For example, can be reproduced in the path management information that is the path sequence form in the clip information file, and use it to manage the reproduction of a plurality of reproduction path video data.At this, PID in each path sequence is checked, to determine the numbering of reproduction paths.Then, the request user selects a path.Be used to reproduce Voice ﹠ Video corresponding to the EP map of selected reproduction paths about selected reproduction paths.And, as discussed above,, can realize seamless change by the EP map that uses the new reproduction paths of arranging with the EP map time of carrying out of old reproduction paths if the user changes reproduction paths at reproduction period.
The source data packet of reproducing receives and converts to data stream (for example, MPEG-2 transport packet stream) by source bale breaker (depacketizer) 4.Demultiplexer 5 is decomposed into the data stream multichannel video and the voice data of coding.The video and the voice data of 6 pairs of codings of AV demoder are decoded, and are fed into the original Voice ﹠ Video data of AV scrambler 9 with generation.At reproduction period, the operation of controller 10 Controlling Source bale breakers 4, demultiplexer 5 and AV demoder 6.The user that controller 10 receives about reproducing operation imports, and provides control information to AV demoder 6, demultiplexer 5 and source packing device 4.For example, the decoding type that controller 10 indication AV demoders 9 will be carried out, the transport stream that indication demultiplexer 5 wants multichannel to decompose, and the source of indication bale breaker 4 source packet format that will adopt.
Though Fig. 5 is described as record and transcriber, should be appreciated that these that have only use Fig. 5 provide the parts of record or representational role, just can provide and write down or transcriber.
Fig. 6 shows second specific embodiment of the clip information file, dish data and the EP map that use in the data structure according to Fig. 2.Except corresponding to the transmits data packets of a plurality of reproduction paths record segmentation by multiplexed (for example, interweave) the mode difference outside, the embodiment of Fig. 6 is identical with the embodiment of Fig. 4 A-4B described above, therefore for for simplicity, only not existing together between the embodiment of Fig. 6 and Fig. 4 A is described.
As shown in Figure 6, be registered as one or more groups, and these groups are by multiplexed about the transmits data packets (TP) of each reproduction paths.Equally, each group comprises at least one single picture (I-picture).As shown in Figure 6, a TP of each group of TP is the TP of I-picture.
Obviously, about the mode of operation of record among Fig. 5 of the embodiment of Fig. 6 and transcriber with top identical according to the described mode of Fig. 4 A-4B.
According to another embodiment, can manage inlet point map EP1,2 and 3 maps as single inlet point map, as shown in Figure 7.In this case, staggered mode is recorded in the inlet point map by the same sequence that is recorded with the TP with three reproduction paths for the PTS of the TP in three different reproduction paths and SPN.
Fig. 7 shows the 3rd specific embodiment of the clip information file, dish data and the EP map that use in the data structure according to Fig. 2.Except single EP map being arranged in the clip information file rather than being included in the EP map about each reproduction paths in the clip file, the embodiment of Fig. 7 is identical with the embodiment of Fig. 6 described above.Therefore, for simplicity, only not existing together between the embodiment of Fig. 7 and Fig. 6 is described now.
As shown in Figure 7, the EP cartographic information that is recorded in the clip information file is managed as single EP map.At this, the PTS of SPN that maps to the TP in different reproduction path is included in the single map.
Obviously, about the mode of operation of record among Fig. 5 of the embodiment of Fig. 7 and transcriber with top identical according to the described mode of Fig. 4 A-4B.But, should be appreciated that to exist other reproducting method and the present invention to be not limited to this example.
Be appreciated that the invention provides a kind ofly have permission and come the file of reproduction of managing video data or the recording medium of data structure according to a plurality of reproduction paths open from top.Therefore, for the reproduction of video data, the invention provides dirigibility than former higher level.
Though disclose the present invention according to limited embodiment, the those of ordinary skill in the art who is benefited from the disclosure is to be understood that it has numerous modifications and variations.For example, though be described according to the blue light ROM CD in some examples, the present invention is not limited to this standard of CD or is defined in CD.As another example, the video of the TP of each reproduction paths and audio frequency PID can be according to the segmentations of wherein having write down TP and are different.All this modifications and variations all should be within the spirit and scope of the present invention.